Pr、Zn共掺杂Cu_(2)O催化剂的制备及其光催化降解甲基橙的研究  

Preparation of Pr and Zn co-doped Cu_(2)O catalysts and their photocatalytic degradation of methyl orange

作　　者：陆啸宇 黄佳楠 张栋梁 王觅堂 LU Xiaoyu;HUANG Jianan;ZHANG Dongliang;WANG Mitang(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093

出　　处：《有色金属材料与工程》2024年第4期93-99,共7页Nonferrous Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(51974168);内蒙古自治区科技重大专项资助项目(2019ZD023,2021ZD0028)。

摘　　要：为增强Cu_(2)O对模拟染料甲基橙(methyl orange,MO)的降解效果,采用液相还原法制备了Pr、Zn共掺杂Cu_(2)O光催化材料。通过X射线衍射仪(X–ray diffractometer,XRD)、扫描电子显微镜(scanning electron microscope,SEM)、紫外-可见分光光度计(ultraviolet–visible spectroscopy,UV–Vis)等技术手段表明:Pr和Zn共掺杂Cu_(2)O光催化剂的平均晶粒尺寸相较于纯Cu_(2)O的略微减小,表现为颗粒尺寸的缩小和表面的活性位点增加;Pr、Zn的掺入降低了Cu_(2)O的带隙和光生电子–空穴对复合率,表现为更好的光催化性能。在对MO的降解实验中,75 min时PZ3-Cu_(2)O对20 mg/L MO的降解效果最佳,降解率达到89.87%,且经过5次循环使用后其降解率仍保持在85%以上。研究得出,共掺杂改性后的Cu_(2)O是一种有较高光催化活性且稳定的光催化剂。Pr and Zn co-doped Cu_(2)O photocatalytic materials were prepared by a liquid-phase reduction method to enhance the degradation of the simulated dye methyl orange(MO)by Cu_(2)O.The Pr and Zn co-doped Cu_(2)O photocatalysts were evaluated by X-ray diffractometer(XRD),scanning electron microscope(SEM)and ultraviolet-visible spectroscopy(UV-Vis).UV-Vis showed that the average grain size of the prepared Pr and Zn co-doped Cu_(2)O photocatalysts decreased slightly compared with that of pure Cu_(2)O,showing a reduction in particle size and an increase in the active sites on the surface,the doping of Pr and Zn reduced the band gap and photogenerated electron-hole pair complexation rate of Cu_(2)O,showing better photocatalytic performance.In the degradation experiments on MO,the best degradation effect of PZ3-Cu_(2)O on 20 mg/L MO was achieved at 75 min with 89.87%degradation rate,remaining over 85%after five cycles.The study shows that the co-doped Cu_(2)O is a high photocatalytic activity and stable photocatalyst with promising application in the treatment of MO wastewater.

关 键 词：光催化 共掺杂 稀土 降解 

分 类 号：O[理学]